Improvement in pumps



inited' tatw NATHAN Tt GOFFIN, OF KNIGHTSTOWN, INDIANA.

Letters Patent No. 112,018, dated February 21', 1871.

IMPROVEMENT! IN PUMPS.

lhe Schedule referred to lx1 these Letters Patent and making part' of the same.

I, NATHAN T. COFFIN, of Knightstown, in the county of Henry and Statt-e of Indiana, have invented certain Improvements in the Mode of Securing Sheet- Metal Lining in Wooden Pnmp-Stoeks, of which the following is e specification.

Nature and Objects of the Invention.

My invention relates to the sheet-metal lining of the interior or" that part of wooden pumps in which the reciprocating-piston works; and

it consists in turning, or enging the ends or" the sheet-metal tube forming the iining into grooves out in the stock for the purpose of securing the lining at hoth ends therein, the objeet being to provide n smooth chamber for the piston te Work in. and to ztvoid use of nails to secure the lining, which are liable to work loose and weer the piston-peeking, en. also to avoid the expensive and imperfect metneci of constructing :t separate oylinder to contain the lining, which -is secured therein et one end only, es is sometimes done, sind whioh is liable to become loose.

Description of the Aeoompanytng Brewing. The rirtwingf represents a, transverse vertical seetion of that part of the pump-stock in whieh thelining is situated.

General Description.

A is the pump-stock, und B, the sheet-metal lining of that part of ythestoul; n which the reciprocating piston works. y

rlhe lining is secured i-ufitsposition by hanging or turning each' of the ends of thetube into grooves eut in the stock. :is shown. ,2.

By this means the lining is irinly and permanently secured from being displaced,` and is et the sinne time left smooth and entirely free from nl! obstructions that would fret or weer the piston-pecking.

i multe no claim to lining wooden punipstoel-:s with sheet metal, as this is in common use.

Claim.

stonk, substantially as set forth.

NATHAN T. COFFIN.

Witnesses DAN. W. KATEFLER, G, F. MAYHEW. 

